/*
 * TouchGraph LLC. Apache-Style Software License
 *
 *
 * Copyright (c) 2002 Alexander Shapiro. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by
 *        TouchGraph LLC (http://www.touchgraph.com/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "TouchGraph" or "TouchGraph LLC" must not be used to endorse
 *    or promote products derived from this software without prior written
 *    permission.  For written permission, please contact
 *    alex@touchgraph.com
 *
 * 5. Products derived from this software may not be called "TouchGraph",
 *    nor may "TouchGraph" appear in their name, without prior written
 *    permission of alex@touchgraph.com.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL TOUCHGRAPH OR ITS CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 */

package geovista.touchgraph.interaction;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.MouseEvent;

import geovista.touchgraph.TGPaintListener;
import geovista.touchgraph.TGPanel;
import geovista.touchgraph.TGPoint2D;

/**
 * DragMultiselectUI contains code for selecting a group on nodes by enclosing
 * them in a dotted box.
 * 
 * @author Alexander Shapiro
 * 
 */
public class DragMultiselectUI extends TGAbstractDragUI implements
		TGPaintListener {

	transient TGPoint2D mousePos = null;
	transient TGPoint2D startPos = null;

	DragMultiselectUI(TGPanel tgp) {
		super(tgp);
	}

	@Override
	public void preActivate() {
		startPos = null;
		mousePos = null;
		tgPanel.addPaintListener(this);
	}

	@Override
	public void preDeactivate() {
		tgPanel.removePaintListener(this);
		tgPanel.repaint();
	}

	@Override
	public void mousePressed(MouseEvent e) {
		startPos = new TGPoint2D(e.getX(), e.getY());
		mousePos = new TGPoint2D(startPos);
	}

	@Override
	public void mouseReleased(MouseEvent e) {
	}

	@Override
	public void mouseDragged(MouseEvent e) {
		mousePos.setLocation(e.getX(), e.getY());
		tgPanel.multiSelect(startPos, mousePos);
		tgPanel.repaint();
	}

	public void paintFirst(Graphics g) {
	}

	public void paintAfterEdges(Graphics g) {
	}

	public void paintLast(Graphics g) {

		if (mousePos == null) {
			return;
		}

		g.setColor(Color.black);

		int x, y, w, h;

		if (startPos.x < mousePos.x) {
			x = (int) startPos.x;
			w = (int) (mousePos.x - startPos.x);
		} else {
			x = (int) mousePos.x;
			w = (int) (startPos.x - mousePos.x);
		}

		if (startPos.y < mousePos.y) {
			y = (int) startPos.y;
			h = (int) (mousePos.y - startPos.y);
		} else {
			y = (int) mousePos.y;
			h = (int) (startPos.y - mousePos.y);
		}

		// God, where are the line styles when you need them
		for (int horiz = x; horiz < x + w; horiz += 2) {
			g.drawLine(horiz, y, horiz, y); // Drawing lines because there is no
			// way
			g.drawLine(horiz, y + h, horiz, y + h); // to draw a single pixel.
		}
		for (int vert = y; vert < y + h; vert += 2) {
			g.drawLine(x, vert, x, vert);
			g.drawLine(x + w, vert, x + w, vert);
		}

	}

} // end
